.close {
    position: absolute;
    color: black;
    text-align: center;
    border-radius: 50%;
    font-size: 27px;
    width: 40px;
    height: 40px;
    right: -20px;
    ;
    top: -20px;
    cursor: pointer;
    background-color: #F2EDE4;
}

.close:hover {
    background-color: #F1E5C0;
}

.btn {
    cursor: pointer;
    height: 4vh;
    width: 6vw;
    border: none;
    background-color: #4371E8;
    color: #F2EDE4;
    font-size: 20px;
}

.btn:hover {
    background-color: #33779E;
}

.small_btn {
    cursor: pointer;
    height: 3vh;
    width: 4vw;
    border: none;
    background-color: #4371E8;
    color: #F2EDE4;
    font-size: 14px;
}

.small_btn:hover {
    background-color: #33779E;
}

#d_drag {
    width: 300px;
    height: 40px;
    line-height: 40px;
    background-color: #e8e8e8;
    position: relative;
    margin: 0 auto;
}

#d_bg {
    width: 40px;
    height: 100%;
    position: absolute;
    background-color: #75CDF9;
}

#d_text {
    position: absolute;
    width: 100%;
    height: 100%;
    text-align: center;
    user-select: none;
    color: #000;
}

#d_btn {
    width: 40px;
    height: 38px;
    position: absolute;
    border: 1px solid #ccc;
    cursor: move;
    font-family: "宋体";
    text-align: center;
    background-color: #fff;
    user-select: none;
    color: #666;
}